This is the Amtrak Bombardier HHP-8 Physics Upgrade pack (TS2016 version).

In order to utilize this freeware physics upgrade, you must have purchased the Amtrak HHP-8 Loco Add-On pack avaliable at Steam: http://store.steampowered.com/app/222558/

This is a freeware pack; in no way is it to be used for commercial purposes. You are free, however to further modify the physics enhancements found in this pack for personal use if you so choose.

THIS IS NOT A SOUND UPGRADE PACK. Physics adjustments made around the existing sounds.

The purpose of this pack is to correct adjust physics and fix the coupler issue with the Amfleet car in Version 48.9a of TS2015.

Also included is the HHP-8 regulator fix from DaveDewhurst on RWA, which "stops it flicking back to 0% when the control is moved with the keyboard." All credit goes to him for developing the fix for the throttle.

UPDATE: Added in Alstom AC Traction Motor sounds (8/23/15).

TS2016 UPDATE (12/1/15): Signature JohnS Brake Fix applied. Brakes are now continuous range and graduated release (you may select any position between minimum application and suppression).
TS2020 UPDATE (6/4/20): New Amfleet brake squeal sounds, new HHP-8 horn and motor blower sounds. Adjusts and adds preload consists.

Parameter Change Log:
1. Adjusted tractive effort and braking effort curves based on real world figures available online.
2. Adjusted amp ratings so that 1 amp = 100 lbs of effort. Maximum traction amps = 710 amps @ 0 mph.
3. Adjusted blended braking function to provide 34,000 lbs (340 amps) of braking effort when auto brake handle is @ 80% from 45 MPH down to 8 MPH; 3000 kW dynamic brake power.
4. Top speed set to 125 mph.
5. Added new set up numbers (680 - 694) with ability to change back to original road numbers.

For more specifics on the specific values that were changed, proceed here: http://railworksamerica.com/forum/viewtopic.php?f=31&t=10774

IMPORTANT; Install Instructions

1. Open the HHP-8 asset pack until the directory reads "C:\Program Files (x86)\Steam\SteamApps\common\RailWorks\Assets\RSC\AcelaHHP8Pack01"
2. Then open the "Railworks_Bombardier_HHP-8_Physics_Mod_Pack.rar" file.
3. Drag the folders from the .rar file and into the directory you opened in step one.
4. Overwrite if asked.
5. The installation should be complete. Run TS2020 to check.

Thank you for downloading and installing.
Enjoy =)